master system

[Bruno]’s Wii RetroPad Adapter was sent into the tip line, and we’re loving the possibility of using Playstation 2, Genesis, NES and SNES controllers with our Wii.

While there are commercial solutions that connect an NES or SNES controller to a Wii, everything connects to the GameCube port and there is no adapter for Sega or Playstation controllers. For his build, [Bruno] used an ATmega168 to read data from the classic controllers and translate that to the Wiimote I2C bus. Think of it as a new classic controller with the same form factor your 8-year-old self knew and loved.

The schematic for the build is very simple and [Bruno] has all the software out in the open. Even the PCB is single sided and looks like it would be a great candidate for a homebrew PCB. There’s no indication [Bruno] is trying to monetize his creation, so he’s either doing right, or so very wrong. Check out the Dualshock 2/Mario 3 demo of this board after the break.

[Gerry O’Brien] tackled his most recent project, designing a flash ROM cartridge for the Sega Game Gear, with great success. Above you can see the test rig he used to reverse engineer the communications between an original ROM chip and the circuit board that it came on. He removed the chip, soldered a ZIF socket to the pads, then used a DIP socket as an adapter for that chip. Connected to each pin is a test lead for a logic analyzer. That’s a heck of a lot of channels to decipher!

It turns out that the cartridges use Integrated Mapping (does anyone have a link explaining this?) so dropping in a flash memory chip is not an option; you need a memory bank controller. [Gerry’s] solution to this issue is twofold: you can etch your own board with a controller chip and ZIF socket for the flash chip, or you can modify a Sega Master System cartridge to use as an adapter board. We’ve got pictures of both methods after the break, as well as his five instructional videos walking us through the fabrication process.